The Four Horsemen of the Apocalypse are described in the last book of the New Testament of the Bible, the Book of Revelation by John of Patmos, at 6:1–8. The chapter tells of a book or scroll in God`s right hand that is sealed with seven seals. The Lamb of God opens the first four of the seven seals, which summons four beings that ride out on white, red, black, and pale horses.
Though theologians and popular culture differ on the first Horseman, the four riders are often seen as symbolizing Pestilence (and less frequently, the Christ or the Antichrist), War, Famine and Death. The Christian apocalyptic vision is that the Four Horsemen are to set a divine apocalypse upon the world as harbingers of the Last Judgment. One reading ties the Four Horsemen to the history of the Roman Empire subsequent to the era in which the Book of Revelation was written as a symbolic prophecy.
When He broke the second seal, I heard the second living creature saying, “Come.” And another, a red horse, went out; and to him who sat on it, it was granted to take peace from the earth, and that men would slay one another; and a great sword was given to him.
— Revelation 6:3-4